Adjustable ratchet-wrench.



0. KORNBERG. ADJUSTABLE BATGHET WRENCH. APPLIOATION FILED DBo.e.19o9.

1HE NcRms PETERS co., wAsHmcoN. D4 c.

O-LE KORNBERG', 0F SUPERIOR, WISCONSIN.

ADJUSTABLE RATCHET-WRENCH.

Speccaton of Letters Patent.

Patented Aug. 3(7), 1910.

Application filed December 6, 1909. Serial No. 531,662.

To all whom it may concern.'

Be it known that I, OLE. KORNBERG, a subject of the King of Norway,residing at Superior, .in the county of Douglas and State of Visconsin,have invented certain new and useful Improvements in AdjustableRatchet-Wrenchesg and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention has for its object to provide an improved adjustableratchet wrench, and to this end, it consists of the novel devices andcombinations of devices hereinafter described and defined in the claims.

The invention is illustrated in the accompanying drawings, wherein likecharacters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a view principally ,in section,taken on the line w1 al of Fig. 2; Fig. 2 is a view in front elevation,with some parts removed and with other parts broken away; and Fig. 3 isa view principally in section on the line m3 fc3 of Fig. 1, with someparts shown in full and with other parts broken away.

rlhe numeral 1 indicates a socket, the interior walls of which aretapered to receive a pair of sliding jaws 2. The jaws 2 are held againstrotation with respect to the socket 1, by means of a pair ofdiametrically opposite V-shaped ribs 3 integrally formed on the taperedwalls of the socket 1 and each jaw 2 is provided on its tapered surfacewith a V-shaped groove 4 adapted to fit over and slide upon one of theribs 3. The outwardly projecting ends of each jaw 2 are formed withcooperating half seats together forming a socket or seat 5 forengagement with the nuts. Leaf springs 6 are interposed between the twojaws 2 and yieldingly force the same apart and into close engagementwith the tapered wallsof the socket 1. For the purpose of positivelymoving the jaws 2 back and forth within the socket 1, in order to varythe size of the nut seatI 5, a screw 7 and a cap nut 8 are provided. Thescrew 7 terminates at one end in a bifurcated head 9 and said head has aremovable lock key 10 mounted in the two prongs thereof. The inner endsof the jaws 2 are reduced in width so as to project between the twoprongs of the bifurcated head 9 and the reduced ends of the jaws 2 arefulcrumed and detachably secured'to the key 10 by means of a pair ofreversely projecting hooks 11 formed at the reduced ends of the jaws 2,by cutting away the inner surface thereof. The outer end of the cap nut8 has screw threaded engagement with the screw 7 and its inner or openend surrounds the head 9 and bears against the socket 1. As is evident,the screw 7 is held against rotation with respect to the socket 1, bymeans of the ribs 3 and grooves 4. By rotating the cap nut 8 withrespect to the screw 7, the jaws 2 may be moved back and forth withinthe socket 1, to vary the size of the nut seat 5, for the purpose oftaking hold of nuts of different sizes. After a nut has been engaged bythe seat 5, the same may be turned by rotating the socket.

For the purpose of rotating the socket 1, a portion thereof is reducedin diameter to afford astop shoulder 12, and an annular head 13, havinga long lever 14, is rota-Hm tively mounted on the reduced portion of thesocket 1 and held against lateral movement with respect thereto by meansof the stop shoulder 12 and a stop collar 15. The

stop collar is secured to the projecting re.

duced end portion of the socket, by screw threaded engagement, and isheld against rotation, by means of a lock pin 16 which projects throughthe stop collar 5 and into the socket 1. The head 13 may be locked tothe socket 1 rigidly, or may be rotated either to the right or the left,by means of a pair of reversely acting dogs 17 that are pivotallysecured at 18 within a seat 19 formed in the head 13. A U-shaped spring20 is mounted in the seat 19 and yieldingly presses the free ends of thedogs 17 toward each other for engagement with a series of square ratchetteeth 21 formed on that portion of the periphery of the socket 1 whichunderlies the head 13. A dog shifting cam 22 is pivotally mounted in theseat 19 between the dogs 17 and is provided with a laterally projectingoperating stem 23 which works within a slot 24 formed in the head 13. Asis evident, by operating the stem 23, the cam 22 may be shifted intoengagement with either of the dogs 17 or into an intermediate positionso that both of the dogs 17 will engage the ratchet teeth 21. The jaws 2and screw 7 are locked together by means of the lock key 10 and the lockkey, in turn, is held against removal by the cap nut 8 and the socket 1.

The above described device, while of simple construction and cheap toconstruct, is thought to be eiiicient for the purposes had in View.

llhat I claim is:

l. In a ratchet wrench, the combination with a socket and means forrotating the same, of a screw having at one end a head, al cap nutreacting between the screw and thesocket and surrounding said head, alock keydetachably mounted in said head but held against removaltherefrom by said cap nut, and a pair of jaws slidably mounted in saidhead for opening and closing movement-s and having cooperating halfseats in their outer ends and terminating at their inner ends in hooksfulcrumed on said lock key and said jaws being held against endwisemovements with respect to said screw, substantially as described.

2. In a ratchet wrench, the combination with a socket having its innerwalls tapered, an operating handle rotatively mounted on said socket anda pawl and ratchet connection between said socket and said handle, of ascrew having at one end a bifurcated head, a cap nut reacting betweenthe screw and socket and surrounding said head, a lock key detachablymounted in the prongs of said head and held against removal therefrom bythe cap nut, and a pair of jaws slidably mounted in said socket but heldto rotate therewith and having cooperating half seats formed in theirouter ends and their inner ends terminating in hooks ulcrumed on thelock key and said jaws being held against endwise movements with respectto said screw, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

OLE KORNBERG. IVit-nesses JOHN A. I-IoBE,

GUTTORM KoRNs'rAD.

